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One Raw material failed assay test is there any chance for failing purity of that material ?
7 14165Why we are use 0.005M Sulphuric acid, in control of absorbance performance test UV Spectrophotometer calibration
2 16379How much sample concentration should i inject against diluted standard in related substances for drug product in hplc analysis
1 4546Post New Analytical Chemistry Questions
How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.
on saturation solubility study data how we can find out the bcs class of drug?
My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards
What is dose dumping? why require to do?
what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means
Why sodium hydroxide used for maintain pH of phosphate buffer
Identify problem faced when mass spectroscopy is used with HPLC system ?
In the HPLC Calibration done wavelength accuracy done between 200nm-280nm .but not done remaining 300-400nm not done ?
If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?
what are risk assement in the analytical qbd?
How we can identify process related and degradation impurity in single method with short period?
Which parameters require to do in tech transfer?
why require the ph, buffer during hplc mobile phase?
What is gelatinization?
what is the purge flow & how to calculate
